MS DOS

The BIOS module includes the default resident drivers for:

Console display and keyboard (CON)
Line printer (PRN)
Auxiliary device (AUX)
Date and time (CLOCK)
Boot disk device (block device)The DOS Kernel performs the following functions:
File and record management
Memory management
Character device input/output
Spawning other programs
Access to real-time clock
Commands
Five standard handles defined by MS-DOS for COMMAND.COM
Standard input CON
Standard output CON
Standard error CON
Auxiliary AUX
List device PRN